Failure to follow the approved tasks for your notebook model may result in damage to the notebook.Replacing Gateway 450SX4 Components
Identifying your notebook model
The label on the bottom of your notebook contains information that identifies your notebook model and its features.
Gateway model number
Warning
It is important that you use the correct service guide for your notebook.
2
www.com
.gateway.

just remove the tape and tighten the screws. make sure that your work space and your notebook are correctly prepared. lay them toward the rear of your work surface (behind your notebook) or far enough to the side that your arms do not accidentally brush them onto the floor.com
. After loosening screws that are deeply recessed in a hole (for example. try the following:
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■ ■ ■ ■
■
■
Place each component’s screws in their own section of a parts sorter. Where screw measurements are shown. unplug the cable before removing the screws. and the second number indicates screw length. the first number indicates screw head width. you can leave the screws in the holes if you place small pieces of masking tape over the hole openings. When you place flat-headed screws on your work surface.Replacing Gateway 450SX4 Components
Preparing your work space
Before performing maintenance on your notebook. Use bright lighting to make part identification easier. stand them on their heads to prevent the screws from rolling off the table. As you remove components and screws. Place each component’s screws next to the component on your work surface. When removing components that are attached to the notebook by a cable. As you remove screws. then place the page toward the rear of your work surface. To help keep track of screws. and make sure that the table top is large enough to hold each component as you remove it. when possible. to avoid damaging the cable. on the bottom of the base assembly). When reassembling the component. Keep your work surface free from clutter and dust that may damage components. Use a magnetized screwdriver for removing screws. and use a grounded or dissipative work mat. place the screws in their respective boxes on the page.
■
■
■
4
www.
■ ■
Wear a grounding (ESD) wrist strap. Print the first page of each task.gateway. Use a stable and strong table.

Disconnect all peripheral devices and remove any PC Cards.Preventing static electricity discharge
Preventing static electricity discharge
The components inside your notebook are extremely sensitive to static electricity. follow these guidelines:
■ ■
Turn off your notebook.gateway.
Warning
To avoid exposure to dangerous electrical voltages and moving parts.
Warning To prevent risk of electric shock.
www. Wear a grounding wrist strap (available at most electronics stores) and attach it to a bare metal part of your workbench or other grounded connection. turn off your notebook and unplug the power cord and modem and network cable before opening the case.
Warning ESD can permanently damage electrostatic discharge-sensitive components in your notebook.
Before replacing components.
■ ■ ■ ■
Touch a bare metal surface on your workbench or other grounded object. Prevent ESD damage by following ESD guidelines every time you open your notebook case. see “Removing the batteries” on page 8. For more information. Remove the main and optional secondary batteries.com
5
. do not insert any object into the vent holes of the notebook. also known as electrostatic discharge (ESD). Unplug the power cord and the modem and network cables.

Never slide components over any surface.
■
Preparing your notebook
Warning To avoid exposure to dangerous electrical voltages and moving parts. Replace the cover before you restore power or reconnect the modem and network cables. follow these guidelines:
■ ■
Avoid static-causing surfaces such as carpeted floors. and packing foam. remove the main and optional secondary batteries. Disconnect all peripheral devices and remove any PC Cards. Disconnect your notebook from the optional port replicator. For more information see “Disconnecting from the port replicator” on page 7. Avoid touching the edge connectors. For more information see “Removing the batteries” on page 8.
To prepare your notebook for maintenance:
■ ■ ■ ■ ■
Make sure that the modular drive is empty.Replacing Gateway 450SX4 Components Before working with notebook components. Turn over your notebook and remove the main and optional secondary batteries.gateway.com
. plastic.
6
www. Remove components from their antistatic bags only when you are ready to use them. turn off your notebook. and unplug the power cord and modem and network cables before opening the case. Turn off your notebook and unplug the power cable and modem and network cables (if attached). Do not lay components on the outside of antistatic bags because only the inside of the bags provide electrostatic protection. Always hold components by their edges.

Disconnecting from the port replicator
Disconnecting from the port replicator
To separate your notebook from the port replicator:
1
Press down on both docking release latches.
2
Lift the notebook off of the port replicator.gateway.com
7
.
www. The notebook will spring up slightly.

gateway. Turn your notebook over so the bottom is facing up.
8
www. Slide the battery release latch and lift the battery out of the bay.com
. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.Replacing Gateway 450SX4 Components
Removing the batteries
Removing the main battery
To remove the main battery:
1 2 3 4
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.

www. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.gateway. Slide and hold the bay module latch closest to the back of the notebook. The battery moves out slightly. Slide the other bay module release latch.Removing the batteries
Removing the optional secondary battery
To remove the secondary battery:
1 2 3 4 5
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.com
9
. Turn your notebook over so the bottom is facing up.

gateway.com
11
.Adding or replacing memory modules
Adding or replacing memory modules
Tools you need to complete this task:
Phillips #0 screwdriver
Important
Use only memory modules designed for the Gateway 450SX4
Memory bay
www.

Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7. Turn your notebook over so the bottom is facing up.com
.gateway.)
Captive screw
12
www. (The screw cannot be removed. Loosen the captive screw that secures the memory cover.Replacing Gateway 450SX4 Components
To add or replace memory modules:
1 2 3 4 5
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.

Adding or replacing memory modules
10
Hold the new or replacement module at a 30-degree angle and press it into the empty memory slot.com
17
.
www.
11 12
Gently press the module down until it clicks into place. make sure that the notch in the module lines up with the tab in the memory slot. Replace the memory bay cover and tighten the captive screw.gateway. If the module does not fit. This module is keyed so it can only be inserted in one direction.

Tools you need to complete this task:
Phillips #0 screwdriver
To replace the 802. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8.Replacing Gateway 450SX4 Components
Replacing the 802. only approved wireless modules provided by Gateway.gateway. Turn your notebook over so the bottom is facing up.com
.11 mini PCI card:
1 2 3 4
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.11 mini PCI card
Caution By law. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.
18
www. explicitly for your Gateway 450SX4 may be installed in this notebook. or a Gateway authorized representative.

Move the antenna wires out of the way, then press outward on the clip at each side of the module until the module tilts upward.

10

Pull the module out of the slot.

www.gateway.com

21

Replacing Gateway 450SX4 Components

11

Hold the new module at a 30-degree angle and press it into the empty slot. This module is keyed so it can only be inserted in one direction. If the module does not fit, make sure that the notch in the module lines up with the tab in the module slot.

12

Move the antenna wires out of the way, then press the module down until it clicks into place.

22

www.gateway.com

Replacing the 802.11 mini PCI card

13

Reattach the black antenna cable to the connector labelled MAIN or M, then reattach the light gray antenna cable to the connector labelled AUX or A.

14

Replace the mini PCI cover, then tighten the captive screw.

www.gateway.com

23

Replacing Gateway 450SX4 Components

Replacing the hard drive kit
Tools you need to complete this task:

Phillips #0 screwdriver

Screws removed during this task:

1 chrome 2.5 × 4 mm (hard drive kit)

To replace the hard drive kit:

1 2 3 4

Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7. Turn your notebook over so the bottom is facing up. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8.

Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.Replacing the hard drive in the hard drive kit
Replacing the hard drive in the hard drive kit
Tools you need to complete this task:
Phillips #0 screwdriver
Screws removed during this task:
1 chrome 2.gateway. Turn your notebook over so the bottom is facing up.com
27
.
www. Remove the hard drive kit by following the instructions in “Replacing the hard drive kit” on page 24.5 × 4 mm (hard drive kit)
2 chrome 3 × 3. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8.5 mm (hard drive)
To replace the hard drive in the hard drive kit:
1 2 3 4 5
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.

gateway.Replacing Gateway 450SX4 Components
6
Remove the two screws that secure the hard drive to the hard drive kit bracket.com
.
28
www.
Screw Screw
7
Remove the bracket from the old drive.

Plastic strip
9 10 11
Replace the two screws that secure the bracket to the drive. Replace the screw that secures the hard drive kit to your notebook.
www. Slide the hard drive kit into your notebook.gateway.Replacing the hard drive in the hard drive kit
8
Insert the new drive into the bracket so the screw holes line up and the plastic strip on the top of the bracket is positioned as shown.com
29
.

gateway. Turn your notebook over so the top is facing up. Open the LCD panel to the normal viewing position.
30
www. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Turn your notebook over so the bottom is facing up. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.Replacing Gateway 450SX4 Components
Replacing the keyboard cover
Tools you need to complete this task:
Flat-blade driver
.com
.OR -
Scribe or non-marring tool
To replace the keyboard cover:
1 2 3 4 5 6
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.

www.
Important Inserting a piece of cloth between the screwdriver and keyboard and notebook case will help prevent damage to your notebook.com
31
.gateway.Replacing the keyboard cover
7
Insert the small flat-blade screwdriver or non-marring tool under the bottom right corner of the keyboard cover and gently pry it up.

You will hear small snapping sounds as the cover comes away from your notebook. Be careful not to break off the tabs found on the left end of the cover.com
.gateway.
32
www.
9
Slide the two tabs on the left end of the new cover under your notebook frame.Replacing Gateway 450SX4 Components
8
Pull the cover off your notebook.

gateway. The cover should be flat all the way across.
Press Press Press
Warning
If the cover is not correctly replaced. The cover is correctly mounted when you can run your finger along the cover and find no loose spots.Replacing the keyboard cover
10
Press down on the cover in several places until it clicks in place.
www.com
33
. your notebook could be damaged when you try to close the LCD panel.

OR -
Scribe or non-marring tool
Phillips #0 screwdriver
Screws removed during this task:
4 chrome 2. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.gateway. Turn your notebook over so the top is facing up. Turn your notebook over so the bottom is facing up.
34
www.5 mm (keyboard)
To remove the keyboard:
1 2 3 4 5 6
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.5 × 2.com
.Replacing Gateway 450SX4 Components
Replacing the keyboard
Tools you need to complete this task:
Flat-blade driver
.

Replacing the keyboard
7
Remove the four keyboard screws that secure the keyboard to your notebook.com
35
.
Screws
www.gateway.

36
www.Replacing Gateway 450SX4 Components
8
Lift the back edge of the keyboard.com
. then slowly rotate it toward you so it lies keys-down on top of your notebook. Be careful not to damage the LCD panel.gateway.

The plug is correctly oriented if the cable is not twisted.
Important The outside of the keyboard plug goes around the keyboard connector.
www. onto the keyboard connector. on the end of the keyboard cable.com
37
.Replacing the keyboard
9
Use your fingers to unplug the keyboard panel connector from your notebook.
10 11
Place the new keyboard keys-down on your notebook with the space bar away from you. Be careful not to touch or damage any other components.gateway. Insert the keyboard plug.
12
Rotate the keyboard toward the LCD panel until the keyboard is almost face-up.

The keyboard should easily fall into place. Reassemble your notebook. Replace the four keyboard screws. Be careful not to damage the LCD panel.Replacing Gateway 450SX4 Components
13
Insert the four tabs located on the front edge of the keyboard into the corresponding slots under the palm rest.gateway.
tabs
14 15 16
Gently press the keyboard down until it is flat all the way across.com
.
38
www.

Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34.5 × 2. Turn your notebook over so the top is facing up. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.gateway.
www.com
39
.5 mm (modem)
To replace the modem:
1 2 3 4 5 6 7
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.5 mm (keyboard)
1 chrome 2.5 × 4 mm 1 chrome 2. Turn your notebook over so the bottom is facing up.OR -
Scribe or non-marring tool
Phillips #0 screwdriver
Screws removed during this task:
4 chrome 2.Replacing the modem
Replacing the modem
Tools you need to complete this task:
Flat-blade driver
.5 × 2.

com
41
.
LED indicator panel shielding
www.gateway.
11
Slide the modem toward you until it slides out from under the LED indicator panel shielding.Replacing the modem
10
Insert the small flat-blade screwdriver or non-marring tool under the left side of the modem and gently pry it up about ¼ inch.

Use the shorter screw to secure the lower-left corner. Slide the modem under the LED indicator panel shielding. then press the modem into place.
13 14 15 16 17
Connect the modem cable to the new modem.com
. Rethread the antenna cables (if applicable). align the modem’s screw holes with the holes on your notebook.
42
www.Replacing Gateway 450SX4 Components
12
Unplug the modem cable from the modem.gateway. Replace the two screws that secure the modem to your notebook. Reassemble your notebook.

com
43
. Turn your notebook over so the top is facing up. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8.OR -
Scribe or non-marring tool
Phillips #0 screwdriver
Screws removed during this task:
4 chrome 2. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.5 × 2. Turn your notebook over so the bottom is facing up.
www. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.5 × 4 mm (LED indicator panel)
To replace the LED indicator panel:
1 2 3 4 5 6 7
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.gateway.Replacing the LED indicator panel
Replacing the LED indicator panel
Tools you need to complete this task:
Flat-blade driver
.5 mm (keyboard)
3 chrome 2. Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34.

When removing the shielding.com
45
. then lift the ends slightly.gateway.
Warning The LED panel’s metal shielding is very thin and will break if you bend it too much. then lift the ends slightly.Replacing the LED indicator panel
10
Carefully lift the middle of the shielding slightly. then repeat until the shielding pulls completely free.
www. then repeat until the shielding pulls completely free. carefully lift the middle slightly.

then lift the entire panel from the notebook. then press the panel into place.
46
www. Rethread the antenna cables (if applicable). Replace the three screws that secure the LED indicator panel to your notebook.com
. Reassemble your notebook.gateway. Carefully replace the indicator panel’s shielding.
12 13 14 15 16
Align the new indicator panel’s screw holes with the holes on your notebook.Replacing Gateway 450SX4 Components
11
Insert the small flat-blade screwdriver or non-marring tool under the left side of the indicator panel and gently pry it up about ¼ inch.

Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34. Turn your notebook over so the top is facing up.com
47
. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.5 × 2.
www.gateway.5 × 4 mm (cooling assembly)
To replace the cooling assembly:
1 2 3 4 5 6 7
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6. Turn your notebook over so the bottom is facing up.Replacing the cooling assembly
Replacing the cooling assembly
Tools you need to complete this task:
Flat-blade driver
.5 mm (keyboard)
4 chrome 2.OR -
Scribe or non-marring tool
Phillips #0 screwdriver
Screws removed during this task:
4 chrome 2.

Replace the four cooling assembly screws.gateway.com
49
.
www. Plug in the cooling fan. Reassemble your notebook.Replacing the cooling assembly
10
At the same time as you lift. move the cooling assembly to the front of the notebook and remove it.
11 12 13 14
Insert the new cooling assembly into your notebook.

Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.gateway. Turn your notebook over so the top is facing up. Turn your notebook over so the bottom is facing up.5 × 4 mm (cooling assembly)
To replace the hinge covers:
1 2 3 4 5 6
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.com
.Replacing Gateway 450SX4 Components
Replacing the hinge covers
Tools you need to complete this task:
Flat-blade driver
.
50
www.5 mm (keyboard)
4 chrome 2. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8.OR -
Scribe or non-marring tool
Phillips #0 screwdriver
Screws removed during this task:
4 chrome 2.5 × 2.

www. then carefully pry them up. Insert the small flat-blade screwdriver or non-marring tool under the bottom of the hinge covers. Reassemble your notebook.Replacing the hinge covers
7
If you are replacing the left hinge cover.
12 13
Snap the new covers into place over the hinges. -ORIf you are replacing only the right hinge cover. Open the LCD panel all the way.
8 9 10 11
Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34.com
51
. go to Step 8. go to Step 10. Remove the cooling assembly by following the instructions in “Replacing the cooling assembly” on page 47.gateway. so it lies flat on the table.

If your notebook has 802.11 mini PCI card” on page 18.5 × 7 mm (hinges and grounding wire)
To replace the LCD panel assembly:
1 2 3 4 5 6 7
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6.11 module by following the instructions in “Replacing the 802. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.5 × 4 mm (cooling assembly)
5 chrome 2. remove the mini PCI 802. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.5 × 2.com
.
52
www. Turn your notebook over so the bottom is facing up. Turn your notebook over so the top is facing up.11 wireless networking built in.OR -
Scribe or non-marring tool
Phillips #0 screwdriver
Screws removed during this task:
4 chrome 2.Replacing Gateway 450SX4 Components
Replacing the LCD panel assembly
Tools you need to complete this task:
Flat-blade driver
.gateway.5 mm (keyboard)
4 chrome 2.

Remove the cooling assembly by following the instructions in “Replacing the cooling assembly” on page 47. Use your fingers to unplug the LCD cable from your notebook. then pull the connector straight up.Replacing the LCD panel assembly
8 9 10 11
Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34. Grasp the large cluster of cables.
www.gateway.com
53
. Remove the hinge covers by following the instructions in “Replacing the hinge covers” on page 50.

pull the detached antenna cables up through the hole in the system board near the touchpad.
www.Replacing the LCD panel assembly
13
If your notebook has 802.com
55
.11 built in.gateway. then carefully pull the cables away from the LED indicator panel shielding.

com
. Thread the antenna cables through the guides on the LED indicator panel shielding.gateway.
Screws Screws
15 16 17 18 19
Place the new LCD panel assembly onto your notebook.
56
www. Reattach the grounding cable. Plug the LCD cable into your notebook. then through the hole in the system board.Replacing Gateway 450SX4 Components
14
Remove the four hinge screws that secure the LCD panel to your notebook. then replace the four hinge screws. Reassemble your notebook.

remove the mini PCI 802. If your notebook has 802. Turn your notebook over so the bottom is facing up. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Remove the LCD panel by following the instructions in “Replacing the LCD panel assembly” on page 52. Remove the hinge covers by following the instructions in “Replacing the hinge covers” on page 50.11 mini PCI card” on page 18. Remove the hard drive kit by following the instructions in “Replacing the hard drive kit” on page 24. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.11 wireless networking built in.com
. Remove the cooling assembly by following the instructions in “Replacing the cooling assembly” on page 47.gateway.11 module by following the instructions in “Replacing the 802. Remove the LED indicator panel by following the instructions in “Replacing the LED indicator panel” on page 43. Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34.Replacing Gateway 450SX4 Components
To replace the palm rest assembly:
1 2 3 4 5 6 7 8 9 10 11 12 13
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6. Turn your notebook over so the top is facing up. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.
58
www.

com
. then remove the three screws on the top of your notebook. carefully pull the cable out of the connector.gateway.
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www.Replacing Gateway 450SX4 Components
15
Turn your notebook over.
Screws
16
Use two fingers to pull up on the touchpad connector tabs. After the connector is in the raised position.

18 19 20 21
Place the new palm rest assembly onto your notebook. Replace all of the palm rest screws. The cable is oriented correctly if it is not twisted.gateway.com
61
. and snap the assembly into place. which are near the LCD panel hinges.Replacing the palm rest assembly
17
Remove the palm rest assembly. This locks the touchpad cable into the touchpad connector.
Important The touchpad cable should slide easily into the touchpad connector. Reassemble your notebook. Use the two shortest screws to secure the top-rear corners of the palm rest.
22 23
Use two fingers to press down on the touchpad connector tabs.
www. Pull up on the touchpad connector tabs to verify that the connector is in the raised position. Slide the end of the touchpad cable into the touchpad connector.

Remove the palm rest assembly by following the instructions in “Replacing the palm rest assembly” on page 57. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.
www. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.gateway. Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34.com
63
. Turn your notebook over so the bottom is facing up.Replacing the CMOS battery
To replace the CMOS battery:
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8.11 module by following the instructions in “Replacing the 802. If your notebook has 802. Remove the LED indicator panel by following the instructions in “Replacing the LED indicator panel” on page 43. Remove the hard drive kit by following the instructions in “Replacing the hard drive kit” on page 24.11 wireless networking built in. Remove the hinge covers by following the instructions in “Replacing the hinge covers” on page 50. Remove the cooling assembly by following the instructions in “Replacing the cooling assembly” on page 47. Remove the LCD panel by following the instructions in “Replacing the LCD panel assembly” on page 52. Turn your notebook over so the top is facing up.11 mini PCI card” on page 18. remove the mini PCI 802.

Reassemble your notebook.Replacing Gateway 450SX4 Components
15
Locate the old battery on the system board.
64
www.
CMOS battery
16 17 18
Insert the small flat-blade screwdriver or non-marring tool under the old battery and gently pry it up until it pops out of the socket.com
. Make sure the positive (+) side of the new battery is facing up.gateway. then press the battery into the socket until it snaps into place.

Turn your notebook over so the bottom is facing up. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7. Remove the hinge covers by following the instructions in “Replacing the hinge covers” on page 50. Remove the hard drive kit by following the instructions in “Replacing the hard drive kit” on page 24. Remove the palm rest assembly by following the instructions in “Replacing the palm rest assembly” on page 57.11 wireless networking built in. If your notebook has 802. Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.
66
www. Remove the LED indicator panel by following the instructions in “Replacing the LED indicator panel” on page 43. Turn your notebook over so the top is facing up.gateway.Replacing Gateway 450SX4 Components
To replace the power board:
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6. Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34.com
. Remove the LCD panel by following the instructions in “Replacing the LCD panel assembly” on page 52.11 module by following the instructions in “Replacing the 802. remove the mini PCI 802. Remove the cooling assembly by following the instructions in “Replacing the cooling assembly” on page 47.11 mini PCI card” on page 18.

Replacing the power board
15
Remove the four screws that secure the power board EMI shield to your system board.com
67
.
www.gateway.
Screws
Screws
16
Lift the shielding away from the system board.

Replace the power board’s EMI shielding.
18 19 20
Align the new power board’s screw holes with the holes on the system board. then replace the screws.
68
www.gateway. Reassemble your notebook.Replacing Gateway 450SX4 Components
17
Insert the small flat-blade screwdriver or non-marring tool under the power board and gently pry up.com
. then press the power board into place.

Remove the main and optional secondary batteries by following the instructions in “Removing the batteries” on page 8. If your notebook has 802. Turn your notebook over so the top is facing up. Remove the cooling assembly by following the instructions in “Replacing the cooling assembly” on page 47. Remove the modem by following the instructions in “Replacing the modem” on page 39.11 mini PCI card” on page 18.gateway. Remove the keyboard by following the instructions in “Replacing the keyboard” on page 34. Remove the LED indicator panel by following the instructions in “Replacing the LED indicator panel” on page 43.Replacing the system board
To replace the system board:
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Disconnect the AC adapter and modem and network cables and prepare your notebook by following the instructions in “Preparing your notebook” on page 6. Remove the hard drive kit by following the instructions in “Replacing the hard drive kit” on page 24. Remove the LCD panel by following the instructions in “Replacing the LCD panel assembly” on page 52. Remove the memory modules by following the instructions in “Adding or replacing memory modules” on page 11. Turn your notebook over so the bottom is facing up. Remove the hinge covers by following the instructions in “Replacing the hinge covers” on page 50.11 module by following the instructions in “Replacing the 802. Disconnect your notebook from the optional port replicator by following the instructions in “Disconnecting from the port replicator” on page 7.
www.11 wireless networking built in. Remove the keyboard cover by following the instructions in “Replacing the keyboard cover” on page 30.com
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. remove the mini PCI 802. Remove the modular drive.

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. Remove the power board by following the instructions in “Replacing the power board” on page 65. Unplug the speakers from the system board (one connector).
Hex nuts
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Remove the palm rest assembly by following the instructions in “Replacing the palm rest assembly” on page 57.gateway.
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Remove the six hex nuts on the rear I/O panel.

Hex nuts
Screws
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.gateway.Replacing the system board
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Remove four system board screws and five system board hex nuts.

Replacing Gateway 450SX4 Components
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While pushing in on the PC Card eject button. Make sure that the rear I/O panel clears the bottom of the chassis (shown by the top arrow) and the side audio jacks clear the bottom of the chassis (shown by the left arrow).com
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www. remove the system board.gateway.

One version of the Gateway 450SX4 system board has a square silver heat dissipater. Before you continue. you should verify that the new system board you received is the same version as the old system board.Replacing the system board
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Turn the system board over and examine it and the inside of the bottom of the chassis.com
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. This type of system board is used with a chassis bottom that does not have thermal pads. Gateway has two versions of the 450SX4 system board.
Heat dissipater
No thermal pads
www.gateway.

Replacing Gateway 450SX4 Components The second version of the Gateway 450SX4 system board does not have a square silver heat dissipater. This type of system board is used with a chassis bottom that has thermal pads.gateway.
No heat dissipater
Thermal pads
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Replacing the system board
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After you make sure that the new system board is the same as the old one. transfer the processor from the old board to the new one.com
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. then remove the processor from the old system board.gateway.
www. Use a flat-blade screwdriver to turn the processor lock screw ¼-turn counter-clockwise.

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Install the processor onto the new system board making sure that Pin 1 on the processor (indicated by the silk-screened arrow on the corner of the processor) aligns with Pin 1 on the processor socket (indicated by the absence of a pin hole in the processor socket).
Pin 1
Pin 1
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www. then lock the processor in place by using a flat-blade screwdriver to turn the processor lock screw ¼-turn clockwise.com
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www. Replace the four system board mounting screws and the five system board mounting hex nuts. Reassemble your notebook.com
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.Replacing the system board
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Remove the modem cable from the old system board and install it on the new board.gateway.
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Place the new system board into your notebook. and 12 use the “short” hex nuts. 10. Hex nut numbered holes 3 and 4 use the “long” hex nuts and hex nut numbered holes 7. Connect the speakers.
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Replace the six rear I/O panel hex nuts.